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Feb; 23 192s; R. 16,274

R. MATT ICE METHOD OF WELDING METALLIC STRUCTURES Original Filed eb 9,-' 1924 Reissue 2d Feb 23, 19 25.

UNITEDFSTATESY Re 1 ,274 PATENT OFFICE.

ROY AL MATTICE, 0F BETHLEHEM, PENNSYLVANIA.

METHOD OF \VELDING- MTETALLIC STRUCTURES.

Original No. 1,515,592,

To all whom it may concern:

Be it known that I, ROYAL ldaa'rrcn, a citizen ofthe United States, residing at 'Bethlehe1n, in the county of Northampton and State of Pennsylvania, have invented certain new and useful Improvements in Methods of Welding Metallic Structures, of which the tollowin 'is a specification.

This invention relates to welding processes for firmly uniting or joining adjacent po tions of a metallic structure and has more particularly been. produced so that a broken or fractured structure can be restored to satisfactory service condition.

One of the principal objects of the invention, generally stated, is to provide a comparatively simple and effective welding method for repairing broken, craclred or fractured. metallic structures at very low cost, thus rendering the structure lit for further use and capable of withstanding all strains to which it may be subjected accord 'ing to service conditions imposed thereon.

Particularly stated, the invention consists in providing a method of repairing metallic structures subject to relatively high and rapid fluctuations in temperature, means being provided whereby the cracked or fractured portion of the structure is suitably closed against leakage and thesevere-internal stresses of the metal adjacent tlie crack or fracture are transferred to a metallic member or bar disposed so as to bridge the crack or fracture. By. bridge I mean so positioned that the major portionof the. me-

" talli'c member spans the fracturein contra- 159,91 Lof 1921.

distinction to the arrangement shown III British patent to Jones 159,914 of 1921 n which the member used really is forme n"- to an integral part at the fractured strum turc. Heretofore it has been customary to weld the metal adjacent the crack into nearly a liomo eneous cross. section as possible but this, has been found to be objectionable in that the'metal in and adjacent the weld is subjected to very high stresses as'the result of expansion and contraction, thus causing the structure when again subjected to rela tive wide variations in temperature to again crack. An example of this type of repair is shown in the British patent to Jones An advantage of the pres to providemeans other than ent invention 18 v the Weld to accomplish the desired result,

said means permitting of the elastic (l6f01 dated November 18, 1924, Serial-No. 531,640, filed. February 8, 1924. Application for reissue filed January 1.5, 1926. Serial No. 81,5?2. l

ceptacles used in steel mills, chemical fac-.

tories and other places where the range of temperatures is exceedingly great. The high temperature to which the pot or ladle is raised by reason of the molten metahtogather with the relative rapid cooling thereof imposes upon the metal such internal stress as to frequently cause the same to crack or fracture, and as the expense in replacing these pots or ladies is exceedingly great it is highly desirable to repair them. Accordingly, I havefoi nd in practice that U-shaped members can be eilectivelyused to bridge or span the crack or fracture, saidmembers having portions thereof electrically welded inand to the adjacent portions of the structure, said members acting to carry the strain and relieve the weld at the crack which latter is utilized to seal-the crack or fracture against leakage.

to illustrate an application of the welding process to cinder pots or ladies:

Figure l'is a perspective View of a cracked cinder pot or cinder ladle showing the same repaired according to the present invention.

Figure 2 is a detail horizontal sectional view illustrating portions of the metal uponopposite sides of the cracker fracture suitably perforated. to receive the bent endsof the U-shaped member shown in position therein,

the crack or fracture being shown welded In the drawings which have been chosen such as illustrated in the drawihgs by way of 4 example, the'relative thickness'ot the metallic structure is determined and the wide fluctuations of temperatures to which the same is subjected in service is-obtained, from which data the-size of the connecting mem her is calculated. In th'e prcsent case the members or bars, and more particularly the cross-sectional area thereof, bear a stress 'relation to the metal of the structure lying between the crack and 'the'openings orre,

cesses receiving the respective bent ends of the bar. I have found that it is desirableto locate the openings upon each sideof the crack a distance therefrom corresponding substantially to twice the diameter ofthe being of such quality as to compensate" for" :free from attachment to the structure;

bar, measured from the inner side of the opening to the crack. a j

The crack in the cinder pot 1 is shown at 2. said crack extending the full height of one wall and necessitating by reason of the length thereof a plurality of bars or U- shaped members 3 to effectively absorb the expansion and contraction of. the metal. The openings or recesses 24 which "receive the projections or bent ends ofthe 'connecting'- bars are shown as extending through the wall; This may be said to be the preferred" method, but it will be understood that these openings are not so limited and may be formed by simply recessing' said walls a distance sufiicient to'insure the necessary anchorage of the projections or bent ends of the bar spanning the crack.

The openings are preferably formed by using an acetylene torch although they may be pr0- duced by drilling, punching or otherwise cutting the same, as may be most convenient. The bent ends or pro ections on the con necting bars are adapted to be inserted in' saidopenings or recesses and subsequently welded therein, the innermost pro ecting ends thereof being cut off in any suitable manner and welded flush with the inner face of the wall being repaired as indicated in Figure 3. While Ihave shown the bar 3 as of circular cross section, it willbe understood that various other shapes of bars may be utilized, such for example as 11 t, square,

hexagonal and octagonal bars, it being observed, however, that the cross-sectional area thereof is so computed as to provide adequate strength to resist the shear strains and all tension and compressive forces to which the barmay be subjected updertheflwide fluctuations of temperatures. 1

The sealing of the crack is-"efiected by weldin 'the same as indicated at 5, said weld being esigned to prevent leakage or escape of the material from the pot or ladle, the nature of said weld being such that it forms a strong bond or joint capable of responding to the expansion and contraction of the,

metal without giving away. V v

Electric welding apparatus is ,-preferably utilized to efiect the securing of the-connecting metallic member or" bar tothe structure,

the intermediate portion of said'bar lying between the portions welded upon each side of the crack or fracture being inaintainrid 15 will also be observed that the openings are varea of the connecting ar.

'spaced from the crack or fracture a such that the intervening portion of the structure or article being welded has a. crosssectional area exceedin the cross sectional According to the present vention abutted metallic members which are subjected in use to comparatively wide fluctuations in temperatures can be effectively united, the joint at the junction of said members bein merely sealed if it is to resist leakage, an

the principal stresses and strains incident to I the expansion and contraction of the metal in the abutted members being delivered to the meallic connecting member bridging the joint.

Changes appropriate thesuccessful carrying out of the invention may be resorted to in conformity with the work in hand and such departures from the'exact description herein may be made without ex- 'ceeding follows.

Having thus described invention, what l:

I claim as'new and this 0 more by L t-- ters Patent, is: v i

1.. The method. of

the scope of the invention which ectin butting to comparatively wide 'fiuctuatibns of ternperature' which involves iforming an open-' 111g in each of saidmembers, sardopenings being'disposed in spaced relation on opposite sides of the abutting faces'oi said mem,-

hers, assembling with said members ia me'eil" tallic connecting element havingang'ulaf projections respectively adapted to' enter said openings, said projections being en:

tered in said openings, and securing said" connecting element in assembled relatioutoj said members so :as tdretain said projections in said openings.

lot;

2, The methodof connecting abutting me- 7 tallic members which are subjected in use to comparatively wide fluctuations of-temperature, whi'th involves forming an opening in each of said members',s'aidopenings being disposed in spaced relation on opposite sides of the abutting iii (3830f said members, as-

sembling with said members a metallic cons.

necting element having angular projections -respectively adapted to. enter said openings, 7 said projections being entered in said openings, and securing said connectin element in assembled relation to said mem rs'so as to retain saidprojections in said openings, the portion of said connecting element-extending acrossfthe abutting-faces of "said meinbers being free of immediate attachment'to said members. Y i

3. The method of connecting abutting metallic members which-are subjected in use to comparatively wide fluctuations of.temperature, which involves forming-an opening in each of saidmembers, said openings being.

eis esea in'spacedrelation on oppos te sides ioc of the abuttihg faces of -said 1nembers',"as-

. sembling with said members a metallic contallic members which are subjected in use to con'iparativcly wide fluctuations of temperature WlIlCll involves sealing the'joint formed a't. the junction of the metallic members,

formingopenings in said members upon opposite sides of the sealed-joint and in spaced relat on therefrom, assembling with said members a metallic connecting device having angular end portions adapted to enter said openings, said portions being entered in said. openings, and welding said angular end portions in place in said openings.

' 5. The method of repairingcrackcd 0r fractured metallic devices which are sub jectcd' inner to comparatively wide fluctuations of temperature, which involves form- .iIig' in said device a plurality ofopenings disposed on opposite sides of the crack or fracture, assembling with said device a inetallic connecting element projections respectively adapted to enter said openings, said projections being inserted in said openings, welding said projections in' place so as to seal said openings, and sealing the crack or fracture. I

6. The method of repa ring cracked or fractured metallic devices which are subjected in use to comparatively wide fluctuations of temperature, which involves forming in. said device a plurality of openings disposed on opposite sides of the crack or fracture, assembling with said device a metallic connecting element having angular projections respectively adapted to enter said openings, said projections being inserted in said openings, securing said projections in place in said openings, so as to seal the latter, and sealing the crack or fracture by welding. I

7. In means for repairing cracked or fractured metallic articles, the combination with an article of the character indicated having a plurality of openings disposed on opposite sides of the crack or fracture therein, of a metallic connecting member having an gular projections respectively extending into said openings, and means for securing said projections in said openings, said securing means forming a wcld uniting said connecting memb'erio said metallic article. I S. In means for repairing cracked or true. tured metallic articles, the combination with an article of the character indicated having a plurality of openings disposed on opposite sides of the crack or fracture therein, of a metallic connecting member'havmg angular projections respectively extending into said having angular openings, means'for securing said projecticnsin'said openings, said securing means formingwelds uniting said connecting members tor sai metallic article, and metallic means welded to said article for sealing the crack or fr'actiu-e therein.

9. In means for repairing cracked- 201 fractured metallic articles, the combination with an article of the-character indicated having a plurality ofopenings disposed on opposite sides of the crack or fracture therer in, of a U-shaped metallic connecting memher having its ends respectively extending into said openings, and metallic means for securing the ends of said U-shaped member i in place, said securing means forming welds uniting said connecting membersto said metallic article. f

10., In means for repairing cracked or fractured metallic articles, the combination i withan article of the character indicated having a plurality of openings disposed on opposite sides ofthe crack or fracture'therein, of a U-shaped metallic connecting memberhaving its ends respectively extending into said openings, and means for securing the ends of said U-shapedmember in place in said openings, said securing means serve ing to seal said openings, and each of said :openings being spaced from the crackor fracture a distance such that the intervenin portion of: the article has a cross-sectiona area exceeding the cross-sectional area of the said U-shaped member.

11. In means for repairing cracked or fractured metallic articles, the combination with an article of the character indicated havin a plurality of openings disposed on opposite sides of the crack or fracture therein, of a metallic connecting member having 2 its ends res ectively extending into sai o enings, an means for securing the ends 0 said metallic member in place in said openings, said securing means serving to seal said openings, and each of said openings being spaced from the crack or fracture a distance such that the intervening portion of the articlehas a cross-sectionalarea ex ceedin'g the crosssectional area of the said metallic-member.

12. The method of electrically welding metallic s'tructures which consists in apply;

fracture of the metallic structure so as to bridge said crack 0-l--f1%10i3111.8, and welding portions of said member to the metallic structure upon opposite sides of said crack or fracture so as to form at the welds a unitary structure whereby the internal stresses of the metal adjacent the crack are transmitted to said member. r

13. The method of welding a cracked orv fractured metallic structure which consists in bridging the crack or fracture by a metallic mem er and electrically welding said,

ving a member disposed across the crack or" I member to the structure atpoints located in spaced relation and upon each side of the crack or-fractnrein such a manner as to form at the weldsa unitary. structure where by the External stresses of the metal adja Icint the crack are transmitted to said mem- 14. :Thcmethod/of electric, welding for repairing a cracked or fractured metallic structure which consists in sealing said crack or fracture by welding, and applying a metallic connecting member to the structure with portions of said member welded to the structure-upon each side of the crack or fracture, the intermediate portion of said connecting memberbridging said members and'said crack or fracture.

15. The method of electric welding for repairingv a broken metallic structure which consists in joining portions thereof adjacent the break by a sealing bond of metal and further uniting said portions by a connectin member having portions electrically welder to the structure upon opposite sides of the joint, the intermediate portion of said connecting member bridging the break in said structure i 16; The method of repairingcracked metallic structures which comprises Welding the crack, forming openings on each side of they crack, assembling-with the structure a metallicelement with the ends thereof in signature.

said openings, and finally welding the ends" fractured metallic articles, the combination with an article of the character indicated having an opening on each side of the crack or fracture, of a metallic connecting member having the ends thereof welded to said article in the before mentioned openings, the intermediate portion of said connecting member bridging the crack or fracture.

, 19. ,Awelded metallic joint comprising a metallic member welded to the metal on each side of said joint, the major portion of said metallic member bridging said joint said metallic member serving to take up the stresses and-strains to which the metallic joint is subjected. 1

In testimony whereof I hereunto aflix my ROYAL Marries.

the joint is subjected are transmitted to said I 

